Google hasn't made it official, but PC World/IDG News Service and the Google Operating System blog are totally convinced that Gmail will get multi-language, on-the-fly translation of their email messages at an event in Brussels today to celebrate Gmail's fifth birthday. The screenshot above, hot off Google's servers, seems to give away the meaning of Google's event description as having "a European multilingual angle." As soon as it happens, you know we'll try it out; in the meantime, we're wondering if Gmail has anything else in store to release today.